Janko Krstic
Verified Expert in Engineering
Software Engineer and Web Developer
Janko是一名软件工程师和架构师，专注于区块链，专注于去中心化金融和自我主权身份(SSI)。. He has years of experience with Bitcoin, Ethereum, Quorum, Fabric, Tendermint, Cosmos blockchains, and Hyperledger Indy and Aries SSI solutions. Janko has recently applied modern distributed systems, cryptography, and blockchain theory to solving SSI-related problems.
Portfolio
Experience
Availability
Preferred Environment
Git, Erlang, Rust, Go, Python, Linux, Blockchain
The most amazing...
...project I've worked on was a secure, 企业级加密钱包，具有搜索和过滤加密记录的标记功能.
Work Experience
Blockchain and SSI Engineer
- 创建了自我主权身份(SSI)钱包，存储学生的可验证证书.
- 编写用于向机构用户颁发可验证凭据的后端系统.
- 设计和研究自主身份库的使用.
DLT Engineer
ASU Pocket - University Technology Office
- 建立了一个网络服务，整合了超级账本Aries和大学的系统, 允许它向学生颁发可验证的证书.
- 指导整个项目的SSI实施过程.
- 构建了几个概念验证应用程序，展示了可验证凭证在教育中的使用情况.
Blockchain Engineer
404 Publishing
- Worked on developing features for the new DAG platform.
- Improved the wallet capabilities of the DAG platform.
- Created the trigger mechanism to allow smarter DAG nodes.
Blockchain Engineer
Forward Edge
- 根据客户的需求选择正确的区块链技术.
- 在Tendermint区块链平台上实现了原型.
- 用Golang编写集成服务，作为区块链的外层.
Blockchain Engineer
Pharmwerks
- 为制药行业的区块链平台设计原型.
- 使用Solidity在以太坊上开发原型智能合约.
- Wrote an engine in Python which integrated with Ethereum.
Blockchain Architect
Tykn tech
- Architectured the platform.
- Implemented the solution using Hyperledger and Python.
- Coordinated with end-user application team.
Senior Blockchain Developer
6fusion (via Toptal)
- 用Go语言编写与区块链平台交互的软件.
- Worked with the Quorum platform.
- Used Docker and kubernetes for deployment.
Solidity/Blockchain Expert with Go Experience
Fractal Blockchain (via Toptal)
- 贡献了用Go编写的与以太坊节点交互的软件(特别是geth节点).
- 审查并改进了用Solidity编写的智能合约.
- 审查并改进了与比特币网络交互的软件.
Software Engineer
Evernym
- 开发了一个安全的加密钱包，旨在用于超级账本Indy.
- Supported the Indy-SDK project.
- 在Hyperledger Indy上创建专有软件，解决与ssid相关的问题.
- 构建可插拔的加密钱包存储后端系统，允许企业规模的钱包.
Software Engineer
TeleSign
- 使用Python和Gevent开发数字发现平台.
- 扩展了用Python和Bottle编写的PhoneID产品.
- Created a URL-shortening service using Python and Flask.
- Built a Number Deactivation product using Python.
Web Developer
BEST
- Wrote an internal HR application using JSP.
- 重构了用自定义内部框架编写的内部投票系统.
- Supported and extended an internal forum written in JSP.
Web Developer
Self-employed
- 用Python和Beautiful Soup写了一个web crawler和scraper.
- 使用Django开发了一个自定义内容管理器后端应用程序.
- Created web microservices using Python.
Experience
Hyperledger Indy Crypto Wallet
http://github.com/hyperledger/indy-sdkSome of the features that distinguish this wallet:
1. 使用标记搜索加密实体的机制
2. 使用椭圆曲线密码术的多个加密密钥
3. 支持企业级加密钱包的可插拔存储系统
基于Hyperledger Indy的红十字会难民身份解决方案
多链跟踪器(区块链数据跟踪器和聚合器)
它与大多数常见的区块链(比特币，以太坊等)集成.)，并通过web套接字将数据馈送到前端仪表板.
Reward System on Top of Ethereum Blockchain
Pharmachain (Provenance and Supply Chain Blockchain)
Website and Web App Used in BEST
Refactored and extended the internal application.
Skills
Languages
Go, Python, Solidity, Rust, Erlang, JavaScript, Java
Platforms
Blockchain Platforms, Ethereum, Blockchain, Hyperledger, Kubernetes, Docker, Hyperledger Fabric, Linux, Hedera Hashgraph
Other
Distributed Ledger Technology (DLT), Distributed Ledgers, Decentralized Applications, Distributed Systems, Self-sovereign Identity (SSI), Directed Acrylic Graphs (DAG), Applied Cryptography, Ethereum Smart Contracts, Smart Contracts, Quorum, IPFS, Bitcoin, Peer-to-peer Networking, Hyperledger Aries, Cryptocurrency, Non-fungible Tokens (NFT), Hashgraph Technology, EOSIO, EOS, Cryptography
Frameworks
Tendermint, Pyramid, Jakarta Server Pages (JSP)， Flask, Django
Tools
Hyperledger Indy, Git, Stellar SDK
Paradigms
Concurrent Programming, Agile, Functional Programming
Storage
Relational Databases, Cassandra, BigchainDB
Libraries/APIs
Beautiful Soup, Gevent, Bottle.py, Node.js, Web3.js
Education
Bachelor's Degree in Software Engineering
University in Belgrade - Belgrade, Serbia
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